<?php
/* $Id$ */
/*
	firewall_aliases.php
	Copyright (C) 2004 Scott Ullrich
	All rights reserved.

	originially part of m0n0wall (http://m0n0.ch/wall)
	Copyright (C) 2003-2004 Manuel Kasper <mk@neon1.net>.
	All rights reserved.

	Redistribution and use in source and binary forms, with or without
	modification, are permitted provided that the following conditions are met:

	1. Redistributions of source code must retain the above copyright notice,
	   this list of conditions and the following disclaimer.

	2. Redistributions in binary form must reproduce the above copyright
	   notice, this list of conditions and the following disclaimer in the
	   documentation and/or other materials provided with the distribution.

	THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
	INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
	AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
	AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
	OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
	SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
	INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
	CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
	ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
	POSSIBILITY OF SUCH DAMAGE.
*/

##|+PRIV
##|*IDENT=page-firewall-aliases
##|*NAME=Firewall: Aliases page
##|*DESCR=Allow access to the 'Firewall: Aliases' page.
##|*MATCH=firewall_aliases.php*
##|-PRIV


require("guiconfig.inc");

if (!is_array($config['aliases']['alias']))
	$config['aliases']['alias'] = array();

aliases_sort();
$a_aliases = &$config['aliases']['alias'];

if ($_POST) {

	$pconfig = $_POST;

	if ($_POST['apply']) {
		$retval = 0;

		config_lock();
		/* reload all components that use aliases */
		dummynet_configure();
		$retval = filter_configure();
		config_unlock();

		if(stristr($retval, "error") <> true)
		    $savemsg = get_std_save_message($retval);
		else
		    $savemsg = $retval;
		if ($retval == 0) {
			if (file_exists($d_aliasesdirty_path))
				unlink($d_aliasesdirty_path);
		}
	}
}

if ($_GET['act'] == "del") {
	if ($a_aliases[$_GET['id']]) {
		/* make sure rule is not being referenced by any nat or filter rules */
		$is_alias_referenced = false;
		$referenced_by = false;
		$alias_name = $a_aliases[$_GET['id']]['name'];
		if(is_array($config['nat']['rule'])) {
			foreach($config['nat']['rule'] as $rule) {
				if($rule['localip'] == $alias_name) {
					$is_alias_referenced = true;
					$referenced_by = $rule['descr'];
					break;
				}
			}
		}
		if($is_alias_referenced == false) {
			if(is_array($config['filter']['rule'])) {
				foreach($config['filter']['rule'] as $rule) {
					if($rule['source']['address'] == $alias_name) {
						$is_alias_referenced = true;
						$referenced_by = $rule['descr'];
						break;
					}
					if($rule['source']['address'] == $alias_name) {
						$is_alias_referenced = true;
						$referenced_by = $rule['descr'];
						break;
					}
					if($rule['source']['port'] == $alias_name) {
						$is_alias_referenced = true;
						$referenced_by = $rule['descr'];
						break;
					}
					if($rule['destination']['port'] == $alias_name) {
						$is_alias_referenced = true;
						$referenced_by = $rule['descr'];
						break;
					}
				}
			}
		}
		if($is_alias_referenced == false) {
			if(is_array($config['nat']['rule'])) {
				foreach($config['nat']['rule'] as $rule) {
					if($rule['target'] == $alias_name) {
						$is_alias_referenced = true;
						$referenced_by = $rule['descr'];
						break;
					}
					if($rule['external-address'] == $alias_name) {
						$is_alias_referenced = true;
						$referenced_by = $rule['descr'];
						break;
					}
					if($rule['external-port'] == $alias_name) {
						$is_alias_referenced = true;
						$referenced_by = $rule['descr'];
						break;
					}
					if($rule['local-port'] == $alias_name) {
						$is_alias_referenced = true;
						$referenced_by = $rule['descr'];
						break;
					}
				}
			}
		}
		if($is_alias_referenced == true) {
			$savemsg = "无法删除该别名，当前正在被 {$referenced_by} 使用。";
		} else {
			unset($a_aliases[$_GET['id']]);
			write_config();
			filter_configure();
			touch($d_aliasesdirty_path);
			header("Location: firewall_aliases.php");
			exit;
		}
	}
}

$pgtitle = array("防火墙","别名管理");
$pgmenu = array('firewall', '/firewall_aliases.php');
include("head.inc");

?>

<body link="#0000CC" vlink="#0000CC" alink="#0000CC">
<?php include("fbegin.inc"); ?>
<form action="firewall_aliases.php" method="post">
<?php if ($savemsg) print_info_box($savemsg); ?>
<?php if (file_exists($d_aliasesdirty_path)): ?><p>
<?php print_info_box_np("别名列表已被更改。<br>您需要应用更改使其生效。");?>
<?php endif; ?>
<div class="soft_cont_right_table">
<table width="100%" border="0" cellpadding="0" cellspacing="0">
<tr>
  <td width="25%" class="listhdrr">名称</td>
  <td width="25%" class="listhdrr">值</td>
  <td width="25%" class="listhdr">描述</td>
  <td width="10%" class="list">
    <table border="0" cellspacing="0" cellpadding="1">
      <tr>
	<td valign="middle" width="17">&nbsp;</td>
        <td valign="middle"><a href="firewall_aliases_edit.php"><img src="/themes/<?= $g['theme']; ?>/images/icons/icon_plus.gif" width="17" height="17" border="0" title="添加"></a></td>
      </tr>
    </table>
  </td>
</tr>
	  <?php $i = 0; foreach ($a_aliases as $alias): ?>
<tr>
  <td class="listlr" ondblclick="document.location='firewall_aliases_edit.php?id=<?=$i;?>';">
    <?=htmlspecialchars($alias['name']);?>
  </td>
  <td class="listr" ondblclick="document.location='firewall_aliases_edit.php?id=<?=$i;?>';">
      <?php
	$addresses = implode(", ", array_slice(explode(" ", $alias['type'] == 'host' ? $alias['address_range'] : $alias['address']), 0, 10));
	echo $addresses;
	if(count($addresses) < 10) {
		echo " ";
	} else {
		echo "...";
	}
    ?>
  </td>
  <td class="listbg" ondblclick="document.location='firewall_aliases_edit.php?id=<?=$i;?>';">
    <?=htmlspecialchars($alias['descr']);?>&nbsp;
  </td>
  <td valign="middle" nowrap class="list">
    <table border="0" cellspacing="0" cellpadding="1">
      <tr>
        <td valign="middle"><a href="firewall_aliases_edit.php?id=<?=$i;?>"><img src="/themes/<?= $g['theme']; ?>/images/icons/icon_e.gif" width="17" height="17" border="0" title="编辑"></a></td>
        <td><a href="firewall_aliases.php?act=del&id=<?=$i;?>" onclick="return confirm('Do you really want to delete this alias? All elements that still use it will become invalid (e.g. filter rules)!')"><img src="/themes/<?= $g['theme']; ?>/images/icons/icon_x.gif" width="17" height="17" border="0" title="删除"></a></td>
      </tr>
    </table>
  </td>
</tr>
	  <?php $i++; endforeach; ?>
<tr>
  <td class="list" colspan="3"></td>
  <td class="list">
    <table border="0" cellspacing="0" cellpadding="1">
      <tr>
	<td valign="middle" width="17">&nbsp;</td>
        <td valign="middle">
          <a href="firewall_aliases_edit.php"><img src="/themes/<?= $g['theme']; ?>/images/icons/icon_plus.gif" width="17" height="17" border="0" title="添加"></a></td>
        </td>
	      <td valign="middle">
          <a href="firewall_aliases_import.php"><img src="/themes/<?= $g['theme']; ?>/images/icons/icon_import_alias.gif" width="17" height="17" border="0" title="<?=gettext("导入");?>" alt="" /></a>
        </td>
      </tr>
    </table>
  </td>
</tr>
<tr>
  <td class="tabcont" colspan="3">
   <p><span class="vexpl"><span class="red"><strong>注意：<br></strong></span>合理使用别名管理主机，网段和端口可以简化防火墙规则的配置。</span></p>
  </td>
</tr>
</table>
</div>
</form>

<?php include("fend.inc"); ?>
</body>
</html>
